TA is always valid.
TA isn’t to predict price. Not a crystal ball.
It’s a tool providing awareness and guidance to make decisions.
Nobody can predict market future movement.

In terms of TA use-case, each to their own. It’s your money, your decision, your loss/profit.

In general DYOR and stop judging/blaming the work of others at your loss.

Would you jump off the bridge just because someone says so? and asking how high?